My wife and I have enjoyed role-play, fantasy / dirty talk, stories, etc. throughout our married life.
In the early years, it was me, whispering dirty fantasies into her ear, as part of our sex play together - I was trying to push her buttons to engage in my fantasies, like her in an MFM threesome, a gang-bang, or having uninhibited, nasty sex with another man. I enjoyed seeing how, and what dirty talk fantasies she responded to - then hearing afterward about how “that would never, ever happen…”
Eventually, as we got into the hot wife lifestyle, we began to realize those fantasies, and bring them to life. Many of our encounters have been fantasy realizations, included role-play, or taken on “theme based” scenarios.
My wife enjoys “being someone else” often during a role-play encounter, taking on all kinds of roles from dominatrix / masturbatrix to submissive. She enjoys sexy-dressing, costuming, and things of that nature that let her exercise her exhibitionist tendencies.
She likes to “script” some encounters, planning out every detail, from what she will wear, to how the encounter will go, move-by-move - the build-up is especially hot, as she gets worked up sexually iterating through possibilities.